Grinder.



A. L. REINER.

Patented Npv. 6, |900.

G B N DE R (Application med Apr. 1s, 1599.)

-3 Sheets--Sheet l.

(No Model.)

No. 66I,|32. Patented Nov. 6, |900. A. L. REINER. GRINDEB.

(Application led Apr, 13, 1899.] (No Model.) 3 sheets-sheet z.

MW WM/f A Y www@ No. 66:,l32. Pata t d N 61 A. L. mamen. n e v 90 G Bl ND E B.

{Applicaton med Apr. 1 8, 1899.)

(No Model.) 3 Sheets-Sheet 3.

ams Penas co.. moro-urna.. wAsNmcro is efficient in operation.

'hereinafter set forth, as shown in the accom,-

the invention.

port the working parts of the machine and to UNITED 'STATES PATENTEEICE.

ANDREW L. REINER, OE BLUE ISLAND, ILLINOIS, ASSIGNOR, BY MESNEASSIGNMENTS, To THE PLANO MANUFACTURING COMPANY, or OHL CAGO, ILLINOIS.

GRINDER.

s'iSEcI'FIoATIoN forming peri ef Letters Patent Ne. 661,132, datedNovember 6, 1900.

Application filed April 13, 1899.1

The invention consists, substantially,in the construction,coinbination,'location, and arrangement Of parts, all as will be morefully panying drawings, and finally specically pointed out in theappended claims.

Referring to the accompanying drawings, and to the various views andreference-signs appearing thereon, Figure lis a top plan view of amachine constructed in accordance with Fig. 2 is a side elevation of thesame looking from the grinderside, parts of the holder being intransverse section, the fly-wheel and parts of the holder being omitted.Fig. 3 is a similar view looking from the opposite side of the machine,parts beingl broken out to more clearly illustrate the operation. Fig.4e is a broken detail view in section on the line 4 4, Fig. 2. Fig. 5 isa detached detail view of the cam-gear for raising and lowering lthegrinder-wheel.

The same part is designated by the same reference-sign wherever itoccurs throughout the several views.

Reference-sign A designates the base of the machine and may be of anysuitable construction and arrangement adapted to sup-` be supported upona table, bench, or other suitable su pport, as indicated at B. The baseVA is provided with Aan arm or standard C, which is provided with abearing D in the upperend thereof adapted'to receive the cylindrical hubE of a bracket F. Arranged to pass longitudinally through the bore ofcylindrical hub E is a shaft, stud, or rod G, upon which is journaled torotate the main drivegear H. The emery-wheel or grinder J is mountedupon a shaft K, journaled in the Serial No. 712.855. iNo model.)

outer ends of arms L M of a casting N, and

is rotated from the main dri ve-gear H through a pinion O, mounted uponsaid shaft K. The grinder or emery-wheel .I is held upon shaft K-bymeans of the pins P, and by re.

moving said pins the shaft K may be withdrawn from its bearings in theends of arms L M, thus permitting of the4 removal of the eInery-Wheel orgrinder and the substitution therefor of another when desired. This is afeature of my invention which is regarded as important, as it enables meto readily and easily change the emery-wheel or grinder to suit thecharacter of work to be accomplished thereby.

The article Q to be operated upon by the grinder is held ina suitableclamp device, which in the particular form shown, but to which theinvention is not limited or restricted, comprises a casting 6, pivotallymounted to swing about a stud 7, mounted in an eX- tension of the base Ain convenient and suitable relation to the eInery-Wheel or grinder, asclearly shown in Figs. 2 and 3. Upon this casting 6 is pivotally mounteda carrier 8, the rocking or swinging movement of which toward theemery-wheel or grinder may be adjustably .limited and regulated by aset-screw 9, tapped through a lug l0 on said carrier and arranged toform an abutment or stop fora depending lug l1 O11 the carrier. 'lhearticle to be operated upon is supported between the jaws 12 13. In theform shown in Fig. 3 the jaw 13 may be replacedy by a table 13', thearticle to be ground adapted to rest or to be 'supported "upon the topsurface of the table therefore to be limited in this respect to theexact construction shown and described.

In the practical operation of an apparatus IOO embodying the principlesof my invention it is desirable and important to impart to theemery-wheel or grinder not only a rotary movement, but also a vibratorymovement, so as to cause the grinder to travel back and forth or alongthe article upon which it operates in order that its work may beaccomplished efficiently and expeditiously. To effeet this result, Isleeve the arms L M of casting N upon the stud or bolt G to rockthereon, and I provide one of said arms, as L, with an extension beyondsaid stud or bolt and form the same into a yoke 15, between the arms ofwhich is arranged to operate a cam 16. This cam is formed on orconnected to a gear-wheel 17, journaled upon a stud i8, mounted inbracket F, and when the position of said gear is suitably adjusted itmeshes with and is driven from a pinion 19, formed on or connected torotate with the main drive-gear H. (See Figs. 1, 3, and 4.) From thisconstruction it will be seen that not only is a rapid rotation impartedto the emery-wheel orgrinder when the main drive-gear is rot-atedthrough the intermeshing of said gear with pinion O on the shaft K,which carries said wheel or grinder, but a vibratory or swingingmovement is also imparted thereto by reason of the rotation of the cam16 between the forkarms of yoke 15. It will also be seen that since thearms L M are pivoted about the axis of rotation of the main drive-gearsuch vibratory movement does not interfere with the constant and propermesh of pinion O with said main drive-gear.

If desired, and in order to secure a steady action of the apparatus whenin operation the bracket F may be provided with an extension 20, (seeFig. 1,) in which is journaled a shaft 21, carrying at one end a fly orbalance wheel 22 and at the other end carrying a pinion 23, arranged tomesh with and to be driven from the main drive-gear H. Thus it will beseen that the emery-wheel or grinder J is located on one side of thedrive-gear H, and the balance-Wheel 22 is arranged approximatelydiametrically opposite on the other side of said gear, and hence theaction of the apparatus is evenly balanced and steadied.

It may sometimes be desirable to operate the grinder Without impartingthereto the Vibratory movement above described. In order to accomplishthis result, I adj ustably mountthe stud or bolt l8in a slot 23 inbracket F, (see Fig. 2,) whereby by loosening the thumb-n ut 24 saidstud or bolt may be moved toward or away from the driving-pinion 19, andhence carrying the gear 17 into or out of mesh with said pinion, asindicated in the drawings. The grinder oremery-wheelmay then continue tooperate Without being Vibrated. If desired and in order to lock theemery-wheel or grinder in a fixed position, the bracket F may beprovided with a rib or projection 25, adapted to engage between two ofthe teeth of gear 17 at some point in the periphery thereof, as clearlyshown in Fig. 3, and when thus engaged the parts are held or locked instationary position by clamping upon thumb-nut 24, thus rigidly holdingthe gear 17. By this means I am also enabled to adjust the height of theemery-wheel with reference to the article upon which it operates. Thisresult is accomplished by adjustably clamping the depending arm 26 ofbracket F to the standard C (see Figs. 3 and 4) by means of the bolt 27and clamp-nut 28. The desired adjustment is secured by arranging thebolt 27 to pass through an elon= gated slot 29 in the standard C, thussecuring a rotary adjustm ent of said bracket about the axis of rotationof the main drive-gear. By this means the elevation of that arm ofbracket F Which carries the locking rib or lug 25 may be regulated, andsince the arms L M, which carry the eatery-wheel, are loosely sleeved torock upon the same axis and cam 16, carried by stud 18, is mounted inthe bracket F and works in the yoke of said arm, it will be seen thatthe elevation of the emery- Wheel may be thus readily adjusted. Thisconstruction also enables me to adjust the movement of the emery-wheelto suit the height of the article upon which it operates during thevibrations thereof, this result being accomplished by suit-ably swingingor adjusting the bracket F upon stud G by loosening nut 28 and movingthe bolt 27 in slot 29 to the desired point and then again clamping theparts together.

In the operation of a grinder embodying the principles above described arotary movement is imparted to the main drive-gear H, and this in turntransmits rotation to the grinder or emery-wheel through the intei-meshing of said gear H with pinion O. Ifit is desired to impart aVibratory movement to the grinder during its operation, the stud 18 issuitably adjusted in the slot 23 of bracket F, so as to cause thecam-gear 17 to mesh with pinion 19 on the hub of the main drive-gear,and the rotation of said cam-gear with the cam portion 16 thereofworking between the forkarms of yoke 15 causes the grinder-supportingarm L, and with it the casting N and arm M, to vibrate about stud G,thus causing the grinder to make regular vibratory excursions along thearticle upon which it is operating and without arresting or interferingwith the rapid rotation thereof. In case it should be desired to omitthe vibratory movements of the grinder and to operate the same instationary position, the stud 18 is adjusted laterally in its slot, soas to cause the, cam-gear 17 to be moved out of mesh with itsdrivingpinion 19 and into position for the rib 25 to IOO IOS

IIO

engage `between the teeth of said gear, thus locking the supporting-armL against vibratory movement. If it is desired to adjust the elevationof the grinder, the n ut 2S is loosened and the bracket F is adjustedupon standard C and angularly about the axis of the main ein drive-gearuntil the desired elevation is secured,and then the nut 28is againclamped up.

Rotation may be imparted to main drivegear H by hand or otherwise. Inthe particular form shown-to which,l however, the invention is notlimited or restricted-I provide said gear with a handle 30, by which thedesired rotation is imparted thereto by hand.

In the case where a movement of the grinder with reference to or alongits work is imparted and in order to relieve the operator of the work ofraising the grinder againstits weight during such movement, Iand hencewith a View to securing an easy operation of the may chine, I arrange aspring` 3l to exert its tension in a direction to raise the grinder,thus assisting in the work of operating the machine. This spring may bearranged in many different ways for securing the desired result. I haveshown a simple and eicient arrangement wherein I coil said spring uponthe cylindrical hub E and engage one end thereof against a lug 32 on thestandard or arm C, and the other end is arranged to engage under thecasting N. By this arrangement it will be seen that the swinging orvibrating movement of the grinder J ina downward direction is againstthe tension of said spring, which tension is thus stored up and isexpended in assisting in the raising of the weight of the grinder whenit is moved in the opposite direction. Thus the springcounterbalancesthe weight of the grinder, and hence secures an easymovement of the machine.

It is obvious that many changes and variations in the details ofconstruction and arl rangement of parts would readily suggest themselvesto persons skilled in the art and still fall within the spirit and scopeof my invention. I do not desire, therefore, to be having an extensionat the other end beyond its pivotal point, an eccentric contacting suchextension to vibrate the frame and the grinding-wheel, a gear actuatingthe eccentric, and a main driving gear-wheel rotating the grind.,-ing-wheel and having a pinion meshing with the eccentric-actuating gear.

2. A grinding-machine comprising a base portion or support, a studmounted therein, a rotatable grinding-wheel, a frame pivoted on saidstud, carrying at one end the grinding-wheel and having a bifurcated armeX- tending beyond its pivotal point, an eccentric located between thebifurcations of said arm and adapted to vibrate the frame, a gearwheelactuating said eccentric, and a main driving gear-wheel arranged on thestud, and adapted to rotate the grinding- Wheel and having a pinion toactuate the eccentric-ac-` tuating gear-wheel.

In witness whereof I have hereunto set myy

